Am i really talking to Google? And why a link to MOMA?

I have an ad campaign with adwords. A while back it got suspended. Around the same time I rebuilt my simple 5-page website by hand (it had been Wordpress before) and changed the names of some of the pages. I also got an email from my hosting company saying that some of my files had been infected with malware.

I cleaned up my site and deleted all infected files. Google continues to disallow my ad. I have been in email contact with them on and off for weeks, via a contact form I found buried in my adwords account pages. The emails have been long and friendly but unhelpful. The grammar and punctuation and even formatting are quite poor. The last email I got, yesterday, told me there was a link on my site which was broken, and that the link is "infecting the site and hence causing malware". (does that statement make the slightest sense?) . They provided the link, which was to one of the pages that I renamed. I clicked the link text because it was hyperlinked, and this took me to Google's "moma single-sign on page". Furthermore, they told me to used "advanced webmaster tools" to fix the site. I googled that, and failed to find anything called "advanced webmaster tools".

I'm not sure if I'm talking to a person at Google or a scammer. These emails are unprofessional and smell of scam, but I emailed Google directly from within my adwords account page.